Re: [ssm] Dual homed multicast src and SSM

[Marshall Eubanks <marshall.eubanks@gmail.com>]

Dear Brian;

Routers set up trees, not edge devices (such as sources).

Generally, by "dual homed" you mean "part of an Autonomous System /
PIM domain with connections to two or more other AS / PIM Domains."
This is done by routers, so if your source is _directly_ connected
to interfaces leading to other domains, it will have to act like a
router and send and receive
PIM control traffic.

However, generally sources are not directly attached to other domains, and
sources and receivers do not participate in PIM and MBGP control
traffic. The internal multicast routing
protocol takes care of the tree creation inside the domain, and PIM
and MBGP take care of the
tree creation between domains.

So, this does not seem like a problem to me - SSM introduces nothing
new to multicast routing. If am
am missing something, please let me know.

Regards
Marshall Eubanks


On Tue, 12 Oct 2004 17:19:04 -0600, Field, Brian
<brian_field@cable.comcast.com> wrote:
> 
> Consider a network operating in SSM and a dual homed multicast src
> device.  Is there a standard way to setup the forwarding between the
> routers and the src device to get the SSM trees built properly?  Seems
> as if the device needs to eiter participate in routing and announce the
> src IP or run something like HSRP.  Issues with these approaches?
> Other options?
> 
> Thanks
> Brian
> 
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